BALANCE SHEETS - Parenthetical - USD ($)	Mar. 31, 2024	Mar. 31, 2023
BALANCE SHEETS
Marketable securities, short-term, amortized cost	$ 12,283,630	$ 15,696,135
Accounts Receivable, Allowance for Credit Loss, Current	15,000	15,000
Marketable securities, long-term, amortized cost	$ 31,417,890	$ 37,495,846
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	6,000,000	6,000,000
Common Stock, Shares, Issued	4,833,676	4,830,826
Common Stock, Shares, Outstanding	4,833,676	4,830,826